2021 Challenger de Santiago III – Doubles

Diego Hidalgo and Nicolás Jarry were the defending champions but only Hidalgo chose to defend his title, partnering Sergio Galdós. Hidalgo lost in the quarterfinals to Hans Hach Verdugo and Miguel Ángel Reyes-Varela.

Evan King and Max Schnur won the title after defeating Hach Verdugo and Reyes-Varela 3–6, 7–6, in the final.

Seeds

First round				Quarterfinals				Semifinals				Final

1	R Matos F Meligeni Alves	w/o
	A Galarneau T Seyboth Wild			1	R Matos F Meligeni Alves	6	4
	N Barrientos F Romboli	7	6		N Barrientos F Romboli	2	6
	N Chappell R Stalder	6	3						N Barrientos F Romboli	4	4
3	H Hach Verdugo MÁ Reyes-Varela	w/o						3	H Hach Verdugo MÁ Reyes-Varela	6	6
	MT Barrios Vera C Gómez-Herrera			3	H Hach Verdugo MÁ Reyes-Varela	6	6
WC	Daniel Alejandro Ortiz M Soto	5	4		S Galdós D Hidalgo	3	4
	S Galdós D Hidalgo	7	6									3	H Hach Verdugo MÁ Reyes-Varela	6	6
WC	Amador Salazar Yáñez Ricardo Urzúa Rivera	6	6									4	E King M Schnur	3	7
WC	Víctor Núñez Benjamín Torres	4	3	WC	A Salazar Yáñez R Urzúa Rivera	1	2
	H Casanova F Díaz Acosta	3	2	4	E King M Schnur	6	6
4	E King M Schnur	6	6					4	E King M Schnur	6	6
	D Fernández Flores Sebastián Santibáñez	w/o						2	LD Martínez G Oliveira	4	1
	F Cerúndolo C Ugo Carabelli				D Fernández Flores S Santibáñez	1	2
	M Pucinelli de Almeida TA Tirante	3	7	2	LD Martínez G Oliveira	6	6
2	LD Martínez G Oliveira	6	6